Cita APA (7a ed.)

Strunk, W. (2007). The elements of style. Penguin Books, USA.

Cita Chicago Style (17a ed.)

Strunk, Wiliam. The Elements of Style. Penguin Books, USA, 2007.

Cita MLA (9a ed.)

Strunk, Wiliam. The Elements of Style. Penguin Books, USA, 2007.